Which Structure or Compartment is Not Part of the Plant's

Question

Which structure or compartment is not part of the plant's apoplast?
A)the lumen of a xylem vessel
B)the lumen of a sieve tube
C)the cell wall of a mesophyll cell
D)the cell wall of a transfer cell
E)the cell wall of a root hair

Accepted Answer

The apoplast is the network of cell walls and intercellular spaces that allows for the movement of water and solutes through the plant. The lumen of a xylem vessel, the cell wall of a mesophyll cell, the cell wall of a transfer cell, and the cell wall of a root hair are all part of the apoplast. However, the lumen of a sieve tube is part of the symplast, which is the network of interconnected living cells in a plant.